Officials at Harvard University are instructing students to evacuate four campus buildings,…
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Half-an-hour before his scheduled exam, 20-year-old psychology major Eldo Kim sent out an email claiming that there were two shrapnel bombs on campus. He listed four possible on-campus locations — including, of course, the building his exam was scheduled in.

At the same time, the FBI — in coordination with the Bureau of Alcohol, Tobacco, Firearms, and Explosives; the United States Secret Service; the Harvard University Police Department; the Cambridge Police Department; the Boston Police Department; and the Massachusetts State Police — responded to Harvard Yard.